CN101862798A - Method for composite forming of jar mouth type large-caliber thin-wall pipe - Google Patents
Method for composite forming of jar mouth type large-caliber thin-wall pipe Download PDFInfo
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- CN101862798A CN101862798A CN 201010124159 CN201010124159A CN101862798A CN 101862798 A CN101862798 A CN 101862798A CN 201010124159 CN201010124159 CN 201010124159 CN 201010124159 A CN201010124159 A CN 201010124159A CN 101862798 A CN101862798 A CN 101862798A
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Abstract
The invention discloses a method for composite forming of a jar mouth type large-caliber thin-wall pipe and belongs to the technical field of pipe forming. The method comprises: performing heat treatment of an original pipe; and designing and processing a rotary blank. In the design of the rotary blank, the volume of the rotary pressing part of the rotary blank is calculated in strict accordance with design requirements, and the thickness and length of the rotary blank are determined specifically according to the volume, wherein the length comprises the length of a part in smooth connection with a non-rotary pressing part. When the processing of the rotary blank is finished, the rotary blank is pressed rotationally; after the rotary pressing, the end face leveling and chamfering treatment of the products are performed; and then, the products are subjected to cold-necking treatment during which the diameter of a necking die is required to be within 30.07mm+/-0.05mm strictly. After the cold-necking treatment is finished, the products are subjected to stress relief annealing, thermal refining and machining for assuring the performance of the finished products. The method improves the uniformity of pipe wall thickness effectively, the rate of qualified products and the utilization rate of raw materials and saves processing cost.
Description
Technical field
The invention belongs to the formation of tubes technical field, relate to a kind of manufacture method of jar mouth type large-caliber thin-wall pipe.
Background technology
Exist a lot of jar mouth type large-caliber thin-wall pipes in many industrial products, the diameter of its bourrelet is greater than 300mm, and pipe thickness is no more than 1: 14 with the ratio of bourrelet diameter.
For example, the middle combustion chamber of 300mm rocket projectile is exactly a kind of typical jar mouth type large-caliber thin-wall pipe.The middle combustion chamber of rocket projectile is positioned at the middle part of engine, and its front end is connected with preceding combustion chamber, and the rear end is connected with after-burner.When rocket projectile flew, the effect of high-temperature high-pressure fuel gas stream and air force and aerodynamic moment was born in middle combustion chamber, and working environment is harsh, and the stress condition complexity is directly connected to reliability of products, security.With respect to forward and backward combustion chamber, the difference of middle chamber structure is: the columnar portion internal diameter size of middle combustion chamber is greater than the two ends internal diameter size, and promptly inner chamber is altar mouth shape, and columnar portion length accounts for more than 70% of whole middle combustion chamber length overall.
At present, the manufacture method of existing jar mouth type large-caliber thin-wall pipe adopts " seamless steel pipe → blanking → machine add → heat treatment → machine add shapings " flow process (adding scheme hereinafter to be referred as machine), that is, adopt tubing to shape by the method for complete mechanical removal material.There is following problem in this technology: 1) stock utilization is extremely low, only is 12.4%.Most of pipe material has become iron filings, and cutting output is big, the processing cost height; 2) unstable product quality, yields is low, only is 88.2%.Evenness of wall thickness is poor, adopts than the rimmer knife bar in the processing of inside and outside shape, exists cutter to quiver and the problem of knife bar undercapacity, and the wall thickness difference only can guarantee between the 0.07-0.19mm.
Summary of the invention
The objective of the invention is for when making jar mouth type large-caliber thin-wall pipe, to guarantee the uniformity of product quality, reduce cost simultaneously, propose a kind of new manufacture method in order to overcome the defective of prior art.Add scheme by adopting " tubing blanking → heat treatment → spinning → shrinkage mouth " shaping scheme (hereinafter to be referred as the spinning scheme) to substitute machine, improved middle combustion chamber wall thickness uniformity, stock utilization is enhanced about more than once, effectively saved processing cost.
The technical solution adopted in the present invention is as follows:
At first, adopt the spheroidizing mode that original tube is heat-treated, make the microstructure of original tube become globular pearlite.
Then, carry out the design and the processing of biscuit throwing.Because rotary pressure deformation is the equal-volume distortion, and middle combustion chamber is the equal-volume distortion of sealing, when biscuit throwing designs, should calculate the volume of the spinning part of biscuit throwing according to the designing requirement strictness, specifically determine the thickness and the length of biscuit throwing according to volume, this length comprises and the slick and sly coupling part of spinning part not.Determine biscuit throwing thickness and length accurately, just can guarantee the rounding off of reducing position inner chamber after columnar portion length that the finished product machine added-time is qualified and the reducing.Therefore, when biscuit throwing designs, reduction during for assurance spinning and follow-up reducing surplus, the reduction of this method elects 78.3% as, and the reducing surplus is elected 8.5mm as, and the length overall of biscuit throwing is 470mm, and the thickness of biscuit throwing is 12.25mm, length is 166.5mm-167.5mm.
According to above-mentioned design objective biscuit throwing is processed.After machining, it is carried out spinning.Because the goods end face that obtains behind the spinning and the perpendicularity of article center axis do not satisfy the requirement of reducing, therefore will carry out planar end surface and chamfered to goods.It is stressed even that the planar end surface processing can make the goods end face shrinkage mouth after the processing contact with shrinkage mouth drift contact portion, the axiality of whole goods after the assurance reducing.The stress of oral area was concentrated when chamfered can reduce reducing.
Afterwards, goods being carried out the shrinkage mouth handles.During processing, the diameter of reducing die will be strict controlled between 306.07mm ± 0.05mm, makes that the goods external diameter after the reducing is controlled between 301.8mm ± 0.3mm; Simultaneously, its length overall is controlled between 980mm ± 0.5mm, thereby meets the product size requirement.Table 1 shows the influence to goods chosen of reducing die diameter:
Under the table 1 reducing die different-diameter to the influence of product properties
After the shrinkage mouth is finished dealing with, goods are carried out stress relief annealing, modifier treatment and machining process successively.Guarantee the performance of end product thus.
Beneficial effect
Adopt the inventive method, the contrast prior art has the following advantages:
(1) adopt spinning-shrinkage mouth combined forming process, it is excessive excessively to change middle combustion chamber inner surface into the nature arc by taper, effectively raises the uniformity of thickness of pipe wall, has improved yields.
(2) effectively improve utilization rate of raw materials, saved processing cost.
The specific embodiment
Be example with the middle combustion chamber of adopting the inventive method to make homemade 300mm rocket projectile below, the specific embodiment of this method is elaborated.
At first, adopt the spheroidizing mode that original tube is heat-treated, make the microstructure of original tube become globular pearlite.
Then, carry out the design and the processing of biscuit throwing.Because rotary pressure deformation is the equal-volume distortion, and middle combustion chamber is the equal-volume distortion of sealing, when biscuit throwing designs, should calculate the volume of the spinning part of biscuit throwing according to the designing requirement strictness, specifically determine the thickness and the length of biscuit throwing according to volume, this length comprises and the slick and sly coupling part of spinning part not.Determine biscuit throwing thickness and length accurately, can guarantee the rounding off of reducing position inner chamber after columnar portion length that the finished product machine added-time is qualified and the reducing.Therefore, when biscuit throwing designs, reduction during for assurance spinning and follow-up reducing surplus, reduction is chosen to be 78.3%, and the reducing surplus is 8.5mm, and the length overall of biscuit throwing is 470mm, and the thickness of biscuit throwing is 12.25mm, length is 166.5mm-167.5mm.
According to above-mentioned design objective biscuit throwing is processed.After machining, it is carried out spinning.Because the goods end face that obtains behind the spinning and the perpendicularity of article center axis do not satisfy the requirement of reducing, therefore will carry out planar end surface and chamfered to goods.It is stressed even that the planar end surface processing can make the goods end face shrinkage mouth after the processing contact with shrinkage mouth drift contact portion, the axiality of whole goods after the assurance reducing.The stress of oral area was concentrated when chamfered can reduce reducing.
Afterwards, goods being carried out the shrinkage mouth handles.During processing, the diameter of reducing die will be strict controlled between 306.07mm ± 0.05mm, makes that the goods external diameter after the reducing is controlled between 301.8mm ± 0.3mm; Simultaneously, its length overall is controlled between 980mm ± 0.5mm, thereby meets the product size requirement.
After the shrinkage mouth is finished dealing with, goods are carried out stress relief annealing, modifier treatment and machining process successively.Guarantee the performance of end product thus.
Carry out statistical analysis and find that adopt the inventive method, Thickness Distribution is 2.68-2.75mm adopting the inventive method and existing machine to add in the rocket projectile that scheme produces the thickness of pipe wall difference of combustion chamber, the wall thickness difference is 0.07mm; And the employing machine to add the Thickness Distribution of scheme be 2.60-2.80mm, the wall thickness difference is 0.19mm, this shows, adopts the inventive method, the uniformity of wall thickness is better than machine and adds scheme.
Secondly, to adopting the inventive method to carry out the economic analysis contrast with prior art.
Machine adds scheme and spinning-shrinkage mouth, and to be compounded to form the economic analysis of scheme blanking as shown in table 2:
Table 2
| Cutting length (mm) | Cutting stock weight (Kg) | From one piece price (unit) | Modified sampling ratio | Stock utilization (%) | |
| Machine adds scheme | ??1000 0 +8 | ??205.1 | ??7793.8 | ??～14％ | ??12.4 |
| Spinning-shrinkage mouth scheme | ??470 0 +8 | ??96.4 | ??3663.2 | ??～7％ | ??26.5 |
| Save | ??530 | ??108.7 | ??4130.6 | ??～7％ | ??14.1 |
Known by last table: spinning-shrinkage mouth is compounded to form scheme and adds the scheme single-piece 108.7Kg that saves material than machine, and by producing 150 calculating per year, blanking can save material 16.31 tons, by 3.8 ten thousand yuan/ton calculation of price, 61.98 ten thousand yuan of the expenses that can save material every year.
Again heat treatment sampling expense is analyzed.The final performance of combustion chamber guarantees that by heat treatment quenching and tempering every metallurgical furnace is taken a sample at least one and done performance evaluation in the rocket projectile.By producing 150 calculating per year, machine adds scheme needs 21 of～21 metallurgical furnaces (about 7 of every metallurgical furnace blanking) samplings, 4.31 tons of weight 205.1 * 21=4307.1Kg ≈.Spinning-shrinkage mouth is compounded to form scheme and needs～11 metallurgical furnaces (about 14 of every metallurgical furnace blanking), takes a sample 11 1.06 tons of weight 96.4 * 11=1060.4Kg ≈.Therefore, but heat treatment sampling economical with materials 4.31-1.06=3.25 ton, and reducing expenses amounts to ten thousand yuan of 3.25 * 3.8=12.35.Therefore, only single blanking operation and heat treatment sampling can be saved 74.33 ten thousand yuan of costs.
Claims (1)
1. the composite forming method of a jar mouth type large-caliber thin-wall pipe is characterized in that may further comprise the steps:
At first, adopt the spheroidizing mode that original tube is heat-treated, make the microstructure of original tube become globular pearlite;
Then, carry out the design and the processing of biscuit throwing; Because rotary pressure deformation is the equal-volume distortion, and middle combustion chamber is the equal-volume distortion of sealing, when biscuit throwing designs, should calculate the volume of the spinning part of biscuit throwing according to the designing requirement strictness, specifically determine the thickness and the length of biscuit throwing according to volume, this length comprises and the slick and sly coupling part of spinning part not; When biscuit throwing designs, reduction during for assurance spinning and follow-up reducing surplus, reduction elects 78.3% as, and the reducing surplus is elected 8.5mm as, and the length overall of biscuit throwing is 470mm, and the thickness of biscuit throwing is 12.25mm, length is 166.5mm-167.5mm;
According to above-mentioned design objective biscuit throwing is processed; After machining, it is carried out spinning; Behind the spinning, goods are carried out planar end surface and chamfered;
Afterwards, goods being carried out the shrinkage mouth handles; During processing, the diameter of reducing die will be strict controlled between 306.07mm ± 0.05mm, makes that the goods external diameter after the reducing is controlled between 301.8mm ± 0.3mm; Simultaneously, its length overall is controlled between 980mm ± 0.5mm;
After the shrinkage mouth is finished dealing with, goods are carried out stress relief annealing, modifier treatment and machining process successively, guarantee the performance of end product thus.
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| CN 201010124159 CN101862798A (en) | 2010-03-15 | 2010-03-15 | Method for composite forming of jar mouth type large-caliber thin-wall pipe |
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| CN 201010124159 CN101862798A (en) | 2010-03-15 | 2010-03-15 | Method for composite forming of jar mouth type large-caliber thin-wall pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081168A (en) * | 2015-09-01 | 2015-11-25 | 无锡贺邦金属制品有限公司 | Machining method of thin-wall metal pipe |
| CN105363869A (en) * | 2015-11-25 | 2016-03-02 | 北京有色金属研究总院 | Spinning method for high-precision large-size thin-wall aluminum alloy pipes |
| CN108838634A (en) * | 2018-07-20 | 2018-11-20 | 西迪技术股份有限公司 | A kind of diaphragm coupling and its pipe fitting part production method |
| CN110125614A (en) * | 2019-04-23 | 2019-08-16 | 晋西工业集团有限责任公司 | A kind of method of heavy caliber altar shape combustion chamber forming |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288519A (en) * | 1977-02-28 | 1981-09-08 | Black Copy Company, Inc. | Dual purpose electrophotographic magnetic toner and process of making |
| CN101242916A (en) * | 2005-08-12 | 2008-08-13 | 杰富意钢铁株式会社 | Two-piece can, manufacturing method therefor, and steel sheet for two-piece can |
| WO2009061073A1 (en) * | 2007-11-07 | 2009-05-14 | Posco | High tensile steel for deep drawing and manufacturing method thereof |
| CN101579804A (en) * | 2009-06-04 | 2009-11-18 | 航天材料及工艺研究所 | Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line |
| CN101712114A (en) * | 2008-10-03 | 2010-05-26 | 福特汽车公司 | Method of forming a one piece component |
| CN101712058A (en) * | 2008-10-03 | 2010-05-26 | 福特汽车公司 | Forming preforms and parts therefrom |
-
2010
- 2010-03-15 CN CN 201010124159 patent/CN101862798A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288519A (en) * | 1977-02-28 | 1981-09-08 | Black Copy Company, Inc. | Dual purpose electrophotographic magnetic toner and process of making |
| CN101242916A (en) * | 2005-08-12 | 2008-08-13 | 杰富意钢铁株式会社 | Two-piece can, manufacturing method therefor, and steel sheet for two-piece can |
| WO2009061073A1 (en) * | 2007-11-07 | 2009-05-14 | Posco | High tensile steel for deep drawing and manufacturing method thereof |
| CN101712114A (en) * | 2008-10-03 | 2010-05-26 | 福特汽车公司 | Method of forming a one piece component |
| CN101712058A (en) * | 2008-10-03 | 2010-05-26 | 福特汽车公司 | Forming preforms and parts therefrom |
| CN101579804A (en) * | 2009-06-04 | 2009-11-18 | 航天材料及工艺研究所 | Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line |
Non-Patent Citations (1)
| Title |
|---|
| 《第十一届全国旋压技术交流大会论文集》 20081231 杨永鲲，韩辉 发动机壳体旋压成形工艺的研究 , 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081168A (en) * | 2015-09-01 | 2015-11-25 | 无锡贺邦金属制品有限公司 | Machining method of thin-wall metal pipe |
| CN105363869A (en) * | 2015-11-25 | 2016-03-02 | 北京有色金属研究总院 | Spinning method for high-precision large-size thin-wall aluminum alloy pipes |
| CN105363869B (en) * | 2015-11-25 | 2017-08-04 | 北京有色金属研究总院 | A kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process |
| CN108838634A (en) * | 2018-07-20 | 2018-11-20 | 西迪技术股份有限公司 | A kind of diaphragm coupling and its pipe fitting part production method |
| CN110125614A (en) * | 2019-04-23 | 2019-08-16 | 晋西工业集团有限责任公司 | A kind of method of heavy caliber altar shape combustion chamber forming |
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Open date: 20101020 |